Free Thyroxine Index Formula. Fti = thyroxine (t4) / thyroid binding capacity fti increases could be caused by hyperthyroidism whilst decreased fti could be attributed to hypothyroidism. Fti = thyroxine (t4) / thyroid binding capacity fti increases could be caused by hyperthyroidism whilst decreased fti could be attributed to hypothyroidism.
Interassay precision (cv) is <5%. Need multiple seats for your university or lab? The page below is a sample from the labce course laboratory assessment of thyroid function (retired 3/27/2020).
The free thyroxine index (fti) is determined by the following calculation:
Antithyroid microsomal antibody = antithyroid peroxidase). The fti is the product of t3 resin uptake and total t4 levels. To apply this formula to yourself, you need your current weight in kilograms. Fti = thyroxine (t4)/thyroid binding capacity.
